642242652 has 12 divisors (see below), whose sum is σ = 1498566216. Its totient is φ = 214080880.

The previous prime is 642242651. The next prime is 642242659. The reversal of 642242652 is 256242246.

642242652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642242651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26760099 + ... + 26760122.

It is an arithmetic number, because the mean of its divisors is an integer number (124880518).

Almost surely, 2^642242652 is an apocalyptic number.

It is an amenable number.

642242652 is an abundant number, since it is smaller than the sum of its proper divisors (856323564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642242652 is a wasteful number, since it uses less digits than its factorization.

642242652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53520228 (or 53520226 counting only the distinct ones).

The product of its digits is 46080, while the sum is 33.

The square root of 642242652 is about 25342.5068215439. The cubic root of 642242652 is about 862.7792957278.

Adding to 642242652 its reverse (256242246), we get a palindrome (898484898).

The spelling of 642242652 in words is "six hundred forty-two million, two hundred forty-two thousand, six hundred fifty-two".